Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9TMK callsign genealogy
Currently held by HOYT, WILLIAM A
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by N9TMK's current licensee, walking backwards.
- KROGMAN, TIMOTHY MWIgranted 2019-05-29cancelled 2019-07-06
Successor callsigns
Callsigns held now by people who previously held N9TMK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9TMK, oldest first.
- HOYT, WILLIAM A IL2003-04-07 → cancelled 2015-05-19
- KROGMAN, TIMOTHY M WI2019-07-06 active